I've had a random thing happen to me. I have had a 32gb SD Card mounted in my Samsung Galaxy S3 phone for months now. Then today randomly as I was just sitting around using my phone suddenly I had a messaged saying that the SD card had come unmounted, I tried taking it out of my phone and placing it back in, but it wouldn't register at all. I then tried inserting it into my laptop and still it wouldn't register. I tried a 2gb SD card in my phone and it worked and also worked in my laptop. Has my Samsung branded 32gb CLASS 10!!! SD Card just randomly broken for no reason whatsoever? Please Help.